[Letter from Daniel Webster Kempner to Isaac Herbert Kempner and Robert Markle Armstrong, November 17, 1955], letter, November 17, 1955; (https://texashistory.unt.edu/ark:/67531/metapth1031409/m1/1/: accessed June 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .